UFC Fighter Takes Down Robber

(TMZ) John "Bones" Jones -- who had a huge UFC fight Saturday night in New Jersey with Shogun Rua -- subdued a robber with an awesome fighting move -- TMZ has learned.

Jones was doing what has become his ritual before a fight ... he was meditating at a park in Patterson, NJ when he heard a woman scream, "I've been robbed!"

Jones began chasing the man for a good distance. hen the fighter caught up with the alleged robber, he knocked the guy's legs out from under him, then placed him in a figure-four leg lock until Patterson cops arrived. more on this story